Verilink PRISM 3060-10 (34-00252.4) Product Manual - Manual (Page 56)

48 T ERMINAL O PERATION
NET PLB
The network payload loopback command loops the network data back toward the
network. Framing, CRC, and FDL are regenerated (Figure 4-9). Framed all ones
are passed to the DTE ports.
DTE MLB
The DTE maintenance loopback command loops all network data back toward the
DTE ports at the network interface. Data is passed through to the network. It is
advisable to set T1-NET Timing to INTERNAL rather than NETWORK when this
loop is enabled.
FAR PLB
The far payload loopback command sends loop codes to the far-end unit to force it
into a network payload loopback mode.
Network Interface Framer /Deframer Multiplexer Receivers /Drivers
NET
PLB
Receivers/Drivers
BERT Generator /
Detector
All ones
to DTE
EIA 530 or V.35
(100' max.)
Framer/Deframer
DTE (DSX1)
RJ48C
DSX1, 1' -655'
to cross-connect
From
NET
To
NET
To
NET
From
NET
5
4
2
1
To Network
From Network
RJ48C
5
4
2
1 To
Ports
From
Ports
Figure 4-9 Network PLB
Network Interface Framer /Deframer Multiplexer Receivers/Drivers
Receivers/Drivers
BERT Generator/
Detector
EIA530 or V.35
(100' max.)
Framer/ Deframer
DTE (DSX1)
RJ48C
DSX1, 1'-655'
to cross-connect
From
NET
To
NET
To
NET
From
NET
5
4
2
1
To Network
From Network
RJ48C
5
4
2
1 To
Ports
From
Ports
DTE
MLB
Figure 4-10 DTE MLB